截面形状为半球U形的钻尖切刃支架。1个V槽限定对应1种直径钻头，如芯高不变，基本可得到理想的刀面角度。
| 对应尺寸 | 名称 | U槽长度（B尺寸） | 沟宽（A尺寸） |
|---|---|---|---|
| ST0.2 | ST0.2-1.0 | 1.0 | 0.20 |
| ST0.2-1.5 | 1.5 | 0.20 | |
| ST0.2-2.0 | 2.0 | 0.20 | |
| ST0.2-2.5 | 2.5 | 0.20 | |
| ST0.25 | ST0.25-1.0 | 1.0 | 0.25 |
| ST0.25-1.5 | 1.5 | 0.25 | |
| ST0.25-2.0 | 2.0 | 0.25 | |
| ST0.25-2.5 | 2.5 | 0.25 | |
| ST0.25-3.0 | 3.0 | 0.25 | |
| ST0.25-3.5 | 3.5 | 0.25 | |
| ST0.25-4.0 | 4.0 | 0.25 | |
| ST0.3 | ST0.3-2.0 | 2.0 | 0.30 |
| ST0.3-2.5 | 2.5 | 0.30 | |
| ST0.3-3.0 | 3.0 | 0.30 | |
| ST0.3-3.5 | 3.5 | 0.30 | |
| ST0.3-4.0 | 4.0 | 0.30 | |
| ST0.35 | ST0.35-2.5 | 2.5 | 0.35 |
| ST0.35-3.0 | 3.0 | 0.35 | |
| ST0.35-3.5 | 3.5 | 0.35 | |
| ST0.35-4.0 | 4.0 | 0.35 | |
| ST0.4 | ST0.4-3.0 | 3.0 | 0.40 |
| ST0.4-3.5 | 3.5 | 0.40 | |
| ST0.4-4.0 | 4.0 | 0.40 | |
| ST0.45 | ST0.45-3.0 | 3.0 | 0.45 |
| ST0.45-3.5 | 3.5 | 0.45 | |
| ST0.45-4.0 | 4.0 | 0.45 | |
| ST0.5 | ST0.5-3.0 | 3.0 | 0.50 |
| ST0.5-3.5 | 3.5 | 0.50 | |
| ST0.5-4.0 | 4.0 | 0.50 | |
| ST0.55 | ST0.55-3.0 | 3.0 | 0.55 |
| ST0.55-3.5 | 3.5 | 0.55 | |
| ST0.55-4.0 | 4.0 | 0.55 | |
| ST0.6 | ST0.6-3.0 | 3.0 | 0.60 |
| ST0.6-3.5 | 3.5 | 0.60 | |
| ST0.6-4.0 | 4.0 | 0.60 |
| 对应尺寸 | 名称 | U槽长度（B尺寸） | 沟宽（A尺寸） |
|---|---|---|---|
| UC0.2 | UC0.2-1.0 | 1.0 | 0.19 |
| UC0.2-1.5 | 1.5 | 0.19 | |
| UC0.2-2.0 | 2.0 | 0.19 | |
| UC0.2-2.5 | 2.5 | 0.19 | |
| UC0.25 | UC0.25-1.0 | 1.0 | 0.23 |
| UC0.25-1.5 | 1.5 | 0.23 | |
| UC0.25-2.0 | 2.0 | 0.23 | |
| UC0.25-2.5 | 2.5 | 0.23 | |
| UC0.25-3.0 | 3.0 | 0.23 | |
| UC0.25-3.5 | 3.5 | 0.23 | |
| UC0.25-4.0 | 4.0 | 0.23 | |
| UC0.3 | UC0.3-2.0 | 2.0 | 0.28 |
| UC0.3-2.5 | 2.5 | 0.28 | |
| UC0.3-3.0 | 3.0 | 0.28 | |
| UC0.3-3.5 | 3.5 | 0.28 | |
| UC0.3-4.0 | 4.0 | 0.28 | |
| UC0.35 | UC0.35-2.5 | 2.5 | 0.33 |
| UC0.35-3.0 | 3.0 | 0.33 | |
| UC0.35-3.5 | 3.5 | 0.33 | |
| UC0.35-4.0 | 4.0 | 0.33 | |
| UC0.4 | UC0.4-3.0 | 3.0 | 0.38 |
| UC0.4-3.5 | 3.5 | 0.38 | |
| UC0.4-4.0 | 4.0 | 0.38 | |
| UC0.45 | UC0.45-3.0 | 3.0 | 0.43 |
| UC0.45-3.5 | 3.5 | 0.43 | |
| UC0.45-4.0 | 4.0 | 0.43 | |
| UC0.5 | UC0.5-3.0 | 3.0 | 0.48 |
| UC0.5-3.5 | 3.5 | 0.48 | |
| UC0.5-4.0 | 4.0 | 0.48 | |
| UC0.55 | UC0.55-3.0 | 3.0 | 0.53 |
| UC0.55-3.5 | 3.5 | 0.53 | |
| UC0.55-4.0 | 4.0 | 0.53 | |
| UC0.6 | UC0.6-3.0 | 3.0 | 0.55 |
| UC0.6-3.5 | 3.5 | 0.55 | |
| UC0.6-4.0 | 4.0 | 0.55 |
